Hi Andreas, Because modifying NILFS_SB_FREQ requires a kernel-recompile anyway, I gave your patch a try. So far everything seems fine and the filesystem survived a series of power-cuts. Although this doesn't prove the code is safe under all circumstances of course, it seems stable enough for my use case on the raspberry pi. I also did some tests on the raspberry with unclean shutdowns and recovery is barely noticeable on the 8GB SD card: unclean shutdown with recovery: > time mount -o bad_ftl /dev/mmcblk0p3 sd_8gb > real 0m3.552s > user 0m0.020s > sys 0m0.430s mount following a proper unmount: > time mount -o bad_ftl /dev/mmcblk0p3 sd_8gb > real 0m1.219s > user 0m0.020s > sys 0m0.280s For me the patch somehow reminds me of running ext4 with journaling disabled - it reduces writes at the cost of longer recovery times after an unclean shutdown. The big difference with nilfs2 is that I don't have to worry the FS won't survive it ;) Thanks, Clemens PS: The only thing I don't really like is the name of the mount option ;) -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
